Polishing-machine.



O. W. BEAM.

POLISHING MACHINE.

APPLICATION FILED OCT. 9, 1911. 1,037, 52, Patented Sept. 10,1912."

2 SHEET8-8HEET 1.

WITNESSES:

G. W. BEAM.

POLISHING MACHINE.

APPLICATION FILED 001'. 9, 1911.

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22 1/8 FIG 4 {7 Patented Sept. 10, 1912.

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, wwu/ 6 6 l INVENTOR first mentioned, and I provide means for in contact with the surface to be polished.-

nally, and means are provided to cause the yplained, Between the said shafts 1 and 2,

in the frame 5, in sucha maner as to be held UNITED STATES PATENT OFFICE.

CHARLES W. BEAM, OF ROCHESTER, PENNSYLVANIA, ASSIGNOR '1Q H. C. FRY GLASS COMPANY, OF ROCHESTER, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

POLISHING-MACHINE.

Application filed October 9,

I Specification of Letters Patent.

Patented Sept. 10, 1912.

To all whom it may concern: I

Be it known that I, CHARLES BEAM, residing at Rochester, in the, county of Beaver and State of Pennsylvania, a citizen ofthe United States, have invented or discoveredycertain new and useful Improvements in Polishing-Machines, of which improvements the following is a specification.

My invention relates to polishing machines, and has particularly to do with machines for polishing curvilinear surfaces of glass, such for example as the exterior surfaces of blanks of glass used in the manu-. facture of reflectors.

The" object of my invention is to provide an efiicient and easily operated machine of the character described.

My invention is illustrated in the accompanying drawings, in which 1 Figure 1 is a side elevation and Fig. 2 is an end elevation of my improved machine. Figs. 3 and 4 illustrate on lar er scale and in section and elevation the po ishing block of my machine.

In the several figures like numerals are used to designate like parts.

In the practice of my invention,.I providea rotable shaft with suitable means to carry ablank and sustain it in polishing position, and I mount a polishing block to bear yieldingly against the surface of the blank tobe polished when carried by the rotatable shaft reciprocating the said polishing block when Referring to the drawings, the blank A to be polished,'which in this particular illustration is a parabolic blank of glass adapted to be used as a reflector, is held on the end of a rotatable shaft 1, preferably by suction (an expedient Well known to those skilled in the art) and the shaft 1 is mounted for rotation in a suitable frame 5. A second shaft 2 is mounted for rotation in the said frame 5. The shaft 2 is provided with suitable connection (belt 3) to a source of power, and a belt 4 connects the said shafts 1 and 2, the arrangement being such that the two shafts will rotate at different speeds for purposes to be hereinafter more fully exa carrier in the form of a rod 6 is mounted from rotation but free to oscillate longitudicarrier to oscillate longitudinally. To this end I secure a disk 7 to the shaft 2, such disk being provided with a cam surface inclined to the axis of rotation of shaft 2, as

1911. Serial No. 653,666-

the end that the said block may be held yielding against the surface of the blank, I preferablyform the carrier rod 6 with a forked termination 11, pivot the polishing-block as at 12 between the forks thereof, and attach a spring 13 to one end and a spring 14 to the other end of the said block. The opposite ends of the said springs may be secured respectively to the frame 5 of the machine and to carrier 6 or its bifurcated head 11. In order to provide an adjustment in the tension of the spring 13 I conveniently secure it to frame 5 through an adjustable arm 15, as shown in the drawin' s. The tension of spring 13, together with t e particular disposition and mounting of the polishing block 10, hold roller 9 against the cam disk 7, and thus reciprocation .of car rier rod 6 is effected by the rotation oiashaft 2. It will be noted that, since shafts 1 and 2 rotate at different speeds, the oscillations-of carrier 6 are not synchronous with the rotations of shaft 1.

The detailed construction of the polish-.

ing-block is shown in Figs. 3 and 4 of the drawings. It consists preferably of a metal box-like casing 17, provided with bars 18, which extend from one side to the other of the said casing and are preferably angularly disposed with relation to its ends. Strips of felt 19, 'or'other suitable polishing material of the proper proportions to fit into the said casing and extend-between the bars 18, are placed within the casing and backed with the blocks 20, to form a buffer. These blocks may be made adjustable, as by screws 21, to the end thatthe said strips 19 may be moved outwardly as they wear down in service. respond in shape to the article to be polished,

and in this instance as the drawings show,

the shape is parabolic.

- In polishing glass, it is customary to ap- 3 The face of the buffer will corsource through the belt 1s thus caused to .other parts of the machine, rouge for polskilled in the art without departing from the spirit of my invention.

I claim herein as my invent-ion:

1. In a polishing-machine, the combination of a rotatable member holding a blank of material in operative polishing position, a polishing block mounted adjacent to said rotatable member and held yieldingly against a blank when in position on said rotatable member, means for rotating said rotatable member, and means for oscillating said polishing block, substantially as described.

2. In a polishing-machine, the combination of a rotatable shaft provided With a seat for a blank to be tory carrier provided with a bifurcated head, a polishing block pivoted in the head of said carrier and spring-controlled in its pivotal movement, suitable means for rotating said shaft, and means for causing said carrier to oscillate non-synchronously with the rotation of said shaft, substantially as described.

In testimony whereof I have hereunto set my hand.

CHAS. W. BEAM.

ply a fluid polishing slurry of rouge to the surface being polished. I preferably provide a rouge dauber and correlate it in its movements to the movement of the shaft 1. A suitable open-topped rouge tank 22 may be secured to the frame 5; and a shaft 23. provided with a brush or dauber 24, ma be operatively connected to the shaft 1, through belt 25, shaft 26. and belt 27, to the end that, asthe' shaft 2 rotates, the brush 24 carried'by shaft 23 may alternately dip into the rouge and apply the rouge to the surface of the blank.

In the operation of my polishing machine. power may be received from a suitable 3, and may be made effective bysuch means as those described to rotate the shaft 1, and to oscillate the spring-held carrier 6. The polishing-block move longitudinally upon the surface of the blank While the blank rotates, the relative movements being such as to effect an even and eflicient polishing. At the same time the dauber being suitably placed and correlated in operation to the ishing is automatically supplied.

I do not wish to limit myself to the details of construction shown herein, for obviously many changes may be made by those Witnesses:

LEMAN W. DOLBY, HERBERT AILES.

polished, an oscilla- 

